The Hollywood superstars have famously avoided walking down the aisle, even though they have six kids together and say they are deeply in love. But Pitt and Jolie told ABC's "Good Morning America" they'd do it for the children.
"I think it would be hard to say no to the kids," Jolie, 35, said Monday morning in an excerpt of an interview airing Monday night on "Nightline."
But, she added quickly: "They're not asking. They are very aware that nothing's missing."
Jolie, who stars in the new spy thriller "Salt," said she and Pitt, 46, like the idea of adding to their brood, but worry about being stretched too thin.r.
"We always have this thing, first thing in the morning, where we're really, really tired, and we look at each other and we wonder, Are we ever going to get sleep?" the actress says. "And yet we still love the idea of having more children."
As it is, they're swamped as the real life "Mr. and Mrs. Smith."
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"We're like bartenders. We're like waiters," she said. "But we still, I think, are able to do it because we manage to have a great laugh. We do it together, and we find fun in it, and because of that, it doesn't matter if you don't get sleep. It's an honor to take care of them."
Jolie said Pitt is the love of her life, and that she plans to grow old with him.
"Of course," she said. "We wouldn't have six children if we weren't absolutely sure of that."